NOTES: Expenditure refers to the value of work done on construction projects underway during a given period time, regardless of when work on each individual project was started or when payment was made to the contractors.

Construction includes new buildings, renovations, mechanical and electrical installations, site preparation, and other materials and structures incidental to construction. Maintenance is not included.

Highways and streets are the largest component of public transportation infrastructure spending. Pavement is the largest part of that spending, accounting for about 70 percent of state and local roadway expenditures.